Combined car-door control and air-brake equipment



m W 9 r n 1 .T W t 0 1 n WW t. W /A m Pmlmmefl U0 Charles A. I\/es,

C. A. IVES. COMBINED CAR DOOR CUNTROL AND AIR BRAKE EQUIPMENT.

' APPLICATION msu u pv. 1.1921.

proved interlocking from the following lpatented ct, lh, lQEQZ.

enemies A. was, or main}; PENNSYLVANIA, essmnonro ;GENERAJLELECT1I0 COMPANYWA oonroiaaa ioivor new YORK. i I 1 COMBINED baa-Dena collidelie-'01 has AER-BRAKE mere/mitt;

hpplieatien fiita sweater 7,1921; Serial in 513,332.

Be it lmo'wn that I, G mmes; A; l vas a citizen of; the United Eitzites, residing at Erie,'county of Erie, State of Pennsylvania, have invented certain new and useful Improvements in Combined Gai -Deer Gentrm and Air-Brake Equipments, offivhic h the followingisaaspec-ification'. l y it My invention relates to combined car" door control and air brake eqiiipn'ients and the object of m invention is to previ 'dean tin arrangement whe any the car do rs can not beqpened uhtil tlie brakes are applied". i p y 4 M invention" will be better understood desoription taken in? conmotion with the accompan ing drawing, and itss o'ope vvillhe pointed-out in the ap* pendedclairnsm 1 1 flRefe'iiiIig to the accompanying d awing which how oneembddimentof my invention, 1' repres nts a reservoir-supplied with fluid pressurefrom a compression 2 and con nectedfit'o reservoirpipe'aof a straight air brake system; I wish it to beunderstoed, however; that ny inyen'tiqn is not limited a-tt H i erepresents a'motorrnans b1-akeva1ve for to a strai ht air brake system asit will v be obvious to one skilled in' the art that itis controllin the s pply and release" of fluid presslir'e to the straight air pipe 5 which is connected to the brake cylinder 6. The brake valve 4 may he of any suitable construction so that in its application position itconneetsj the main reservoir pipe 3 to th straight "air pi e" 5 and in its-grelease posiatmosphere.

, 8; re resents a dbbrengine which isqpreyvidedwith the door opening pipe 9 and the the 'can'doors" controlled fluid under pressure is admitted" to the door closing side'- and the door o ening side 1s connectedt atmosphere the door engine operates toclose the ear doors controlled door op ning pipe 9ifs 'controlled hyarnanuall operated doon valve 11 which is st 13 is arranged arranged to release the The door engine is thereby and when ranged that it connects the door opening pipe 9 to the main reservoir pipe 8 and the doonolosing pipe to atrnospherein its door opening position and connects the door openmg pipe 9 to atmosphere and the door olosingpipeto the main reservoir pipe 3 in its oorclosing position. The door valver "e trang d to be operated by a jrnovahle with the ratchet 13 153 valve can not he moved haa'1cflle12; This handle is provided with ,t i any suitable loclring ineans, such as a ratchet "65 and paw? 14. Which is'held in engagement iiia direction to open the doors, The pawl I nient with the ratchet 13' so that" thed'oor valve may he moved into its dooropen ing positlen, hymeansoi? a piston 16 vhichis pawl when fluid pressureissup lied to a pipe 17.

" For-interlocking the air brakes and the car doors so that thedoors can beopened only when: the brakes are applied andth'e brakes can notloe arefopened, I provide the interlookihg valve deviceQO. This valve device 2O'con1pifises a cheek valve 21 and alift valve 22 which control the communication between, the straight-air pipeh and the passage 23 which is'fc'onneoted to the brake cylinder 6. The check valve 21is norm lly F eld in its closed position by springae. Thisvalve; however, is-arrang'hd so that it opens and estabfair pipe 5 and the brake 23 when the pressure iii-the straight air pipe exceeds the pressure in the brake cylinder by a predetermined amount; is normally held in its o means of afs' aring 26L trolled by means cylinder passage of the telescoping piston 27 which is connected to the valve 22 by a piston stem 28 and a spring29 which is interposed between the piston and thestem so that" when the"piston-movesdown" and seats-the valve, the piston can travel a small distance further and-{seat against the leather brake cylinder'passage' 23" to be r'noved out of engage released When the dolofs ,7

lis'hes communication"between the" straight ThevaheQQ penpositioh by x This valve is con his' valve30 is I10 normally held in its closed positionvby means of a spring 31 and is arranged'to open and establish communication between the door opening pipe 9 and the brake cylinder passage 23throu'gh-fa restricted port when the pressure in the door opening pipe exceeds the pressure in the brake cylinder passage 23. i

The interlocking valve is also provided with a loaded valve 410 which controls the supply of fluid pressure to the pipe 17. This'valve 40 is normally held in its closed positionby means of spring 11. One side of the valve 40 is subject to atmospheric 5 pressure and a portion of the otherside is subject to the pressure in the brake cylinder passage 23 and another portion of the latter side is subject to the pressure in the passage 39., This valve lO-is arranged to establish "communication between the brake cylinder passage 23 and the pipe 17 whenthe brake cylinder pressure reaches a predetermined value. 1 1

' The operation of the embodiment of my 5 inventionshown in the drawing); is as follows; The air brakes are applied and released in the usual manner by means of the brake valve 1. When the brakes are released the loaded valve ll) is closed. Therefore the valve piston 16 is out of engagement with the pawl 1 1 so that the door valve vhandle. 12 which is in its door closing position cannot be moved into its door opening POSIUOIL 1 When the brakes are applied fluid is-supplied through the straight air pipe 5 and the brake cylinder'passage 28 to the brake cylinder 6. v If the brake cylinder pressure builds up to a predetermined value the loaded valve 40 opens and establishes communication between the brake cylinder passage 23 andthe pipe 17. Fluid. then flows to one side of the piston 16 and operates it so that the pawl 1 1 is moved out of engagement with the ratchet 13. The handle 12 may now be operated so as to move the door valve 11 into its door opening position to open;the car doors. Since the handle 12 cannot be moved iiito its door opening position .until the brake cylinder pressure is above a predetermined value it is evident that the car doors can be opened only when the brakes are applied. 1

, Since the pressure in the door opening pipe 9 is the same as the pressure in the main reservoir pipe when the doors are open, this pressure also causes the piston 27 to movedownwardly if less than a predetermined straight air application ofvthe brakes is made. This downward movementor the piston closes the valve 22 so that if the 1 brake valve 4 is'moved to its release position, in which position the straight air pipe 5 is connected to atmosphere, the fluid 6h pressure .in th'e brake. cylinderis notexhausted. Consequently, the brakes cannot be released while the doors are open.

The check valve 2i permits l'luid to flow from the straight air pipe to the brake cylinder passage 23 so as to maintain the brake cylinder pressure against leakage while the brake valve is in it application position and the doors are opened. It, how ever, the brake valve is moved to its release position so that the supply of fluid pressure to the straight air pipe 5 is cut oil while the doors are open the brake cylinder pressure is still maintained by means of check valve which establishes communication between the door opening pipe 9 and the brake cylinder passage 23 through the restricted passage 32. 7

When the door valve 11 is moved to its door closing position to close the car doors the door opening pipe 9 is connected to atmosphere so that the valve 22 operates and establishes communication between the straight air pipe 5 and the brake cylinder passage 23. The brakes may then be released by moving the brake valve 4 to its release position, in which position the straight air pipe is connected to atmosphere so that fluid pressure is vented from the pipe 17 and the piston 16 is restored to its normal position.- Since the brakes can only be released when the door valve 11 is in its door closing position, it is evident that the door valve is always looked in its door closing position. When the brake cylinder pressure decreases below a predetermined value the loaded valve closes and cuts oil communication between the pipe 17 and the brake cylinder passage 23. 1

While I' have shown and described one embodiment of my invention, I do not de sire to be limited thereto but seek to cover in the appended claims all those modifications that fall within the true spirit and scope of my invention.

lVhat I claim as new and desire to secure by Letters Patent of the United States, is,-

1. In a combined car door control and air brake equipment, the combination with a brake cylinder, :1 motormans brake valve for controlling the supply of fluid pressure .to said brake cylinder to apply and release the brakes, and a door valve for controlling the car doors, of means for preventing the movement of said door valve while the brakes are released. I

2. In a combined car door control and air brake equipment, the combination with a brake cylinder, a motormans brake valve for controlling the supply of fluid pressure to said brake cylinder to apply and release the brakes, and a door valve for controlling the car doors, of means for normally locking said door valve againstmovement into its door opening position and operated upon an application oi the brakes for releasing said door valve to permit the movement of the same into its door opening position.

3. In a combined car door control and air brake equipment, the combination with a brake cylinder, a motormans brake valve for controlling the supply of fluid pressure to said brake cylinder to apply and release the brakes, and a door valve for controlling the car doors, of means for normally locking said door valve against movement into its door opening position and a piston arranged to be operated by fluid pressure supplied when the brakes are applied for releasing said locking means.

4:. In a combined car door control and air brake equipment, the combination With a lltpfll brake cylinder, a motormans brake valve for controlling the to said brake cylinder the brakes, and a door valve for controlling the car doors, of means for normally locking said valve door opening position, a piston arranged to be operated by fluid pressure for releasing said locking means, and means arranged to supply fluid pressure to said piston only While the brakes are applied and to prevent the release of the brakes While the doors are open.

In Witness whereof, I have hereunto set my hand this 4th day of November, 1921. CHARLES A. IVES.

to apply and release supply of fluid pressure against movement into its 

